Answers to Question

Topics: Light, Photon / Pages: 3 (509 words) / Published: Feb 20th, 2011
Answer to Questions and Problems 1) In a strain gauge bridge, what does (a) a negative reading on the zero centered meters imply? (b) a positive reading on the zero centered meters imply?
- A negative reading on the zero centered meter implies that the strain gauge is under compression. Whereas, a positive reading implies that the strain gauge is under tensile / tension.

2) Beside strain gauge transducers, what other transducers can be used in a bridge circuit?
- Besides strain gauge transducers, many materials can be used as a makeshift bridge circuit. Materials such as photoelectric which absorbs light and convert the light energy to electrical energy. Etc..

3) Before any strain is applied, the bridge is balanced with R1= 1k, R2= 100, R= 625 and R= 0. Determine the strain if the bridge was rebalanced with R= 2.4.
Given: R1= 1k R= 0 R2= 100 R= 2.4. R3= 625  Req’d: Rsf.
Solution:

4) The bridge from the previous problem is balanced this with R1= 3k , R2= 100, R= 1250 and R= 0. Determine the strain if the bridge was rebalanced with R= 6.4.
Given: R1= 3k R= 0 R2= 100 R= 6.4. R3= 1250 
Solution:
Rs= (100/3k)(1250)
Rs= 41.67

Rs= (100/3k)(6.4)
Rs= 0.21

Rsf= 41.67 + 0.21
Rsf= 41.88

5) Determine the value of Rx from the balanced bridge shown in the figure below.

Solution:
*From the balance bridge about we can say that:

20(10)=Rx(5)
Rx= 40

Answer to Questions and Problems 1) In a strain gauge bridge, what does (a) a negative reading on the zero centered meters imply? (b) a positive reading on the zero centered meters imply?
- A negative reading on the zero centered meter implies that the strain gauge is under compression. Whereas, a positive reading implies that the strain gauge is under tensile / tension.

2) Beside strain gauge transducers, what other transducers can be used in a bridge circuit?
- Besides strain gauge transducers, many materials

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